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Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)最新文献

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Analysis of a Hydrodynamic Thrust Bearing Operated under Unsymmetrical Conditions 非对称工况下流体动力推力轴承的分析
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-02-01 DOI: 10.1243/JMES_JOUR_1981_023_006_02
Z. Safar
{"title":"Analysis of a Hydrodynamic Thrust Bearing Operated under Unsymmetrical Conditions","authors":"Z. Safar","doi":"10.1243/JMES_JOUR_1981_023_006_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_006_02","url":null,"abstract":"Analytical solutions for the pressure, load capacity, friction, and flow of a Michell thrust bearing in asymmetric operation are presented. The flow developed in this bearing is asymmetric because the surface rotation axis is offset from the bearing sector axis. These bearings are used with circular saws to constrain transverse displacement of the blades. The pressure, load capacity, friction, and flow increase significantly with offset of the bearing and rotation axes, and they are sensitive to the sector orientation. Results are presented for two sector angles and a complete range of orientations.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130842003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Large Deflection Cylindrical Bending Analysis of Cross-Ply Laminated Strips 交叉铺层带材大挠度圆柱弯曲分析
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-02-01 DOI: 10.1243/JMES_JOUR_1981_023_005_02
G. Turvey
{"title":"Large Deflection Cylindrical Bending Analysis of Cross-Ply Laminated Strips","authors":"G. Turvey","doi":"10.1243/JMES_JOUR_1981_023_005_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_005_02","url":null,"abstract":"A finite-difference implementation of the dynamic relaxation (DR) method is used to solve the equations for antisymmetrically laminated, cross-ply strips. Comprehensive dimensionless results are presented for uniformly loaded simply supported and clamped GFRP (glass fibre reinforced plastic) and CFRP (carbon fibre reinforced plastic) strips in order to establish the influence of extensional-flexural coupling on the strip response in the large deflection regime.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130137087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Design of Planetary Cams for Short Period Events 短周期事件行星凸轮的设计
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-02-01 DOI: 10.1243/JMES_JOUR_1981_023_004_02
S. Turnbull
{"title":"Design of Planetary Cams for Short Period Events","authors":"S. Turnbull","doi":"10.1243/JMES_JOUR_1981_023_004_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_004_02","url":null,"abstract":"A cam mechanism is described in which a planetary cam operates in sequence a number of equally spaced radial translating followers, the lift and return of the followers taking place during a small angular rotation of the arm which carries the planetary cam.Equations for the synthesis of the planetary cam are developed, along with those for the sliding velocity between cam and follower.A method for allowing small variations in timing is described and some experimental results are given for a number of cams operating two different types of translating follower.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123903108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic Loading of Micropolar Fluid Lubricated Short Journal Bearings 微极流体润滑短轴颈轴承的动态加载
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-02-01 DOI: 10.1243/JMES_JOUR_1981_023_007_02
C. Singh, P. Sinha
{"title":"Dynamic Loading of Micropolar Fluid Lubricated Short Journal Bearings","authors":"C. Singh, P. Sinha","doi":"10.1243/JMES_JOUR_1981_023_007_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_007_02","url":null,"abstract":"Dynamically loaded bearings in which the load alternates or rotates are studied in this paper. The Reynolds equation for the general case of a dynamically loaded infinitely short bearing is derived, where the lubricant is assumed to be micropolar. Detailed consideration is given to the dynamic behaviour of squeeze films in a short journal bearing under a sinusoidal load with no journal rotation. Various bearing characteristics are calculated, assuming a full film to exist. The micropolarity of the fluid results in more resistance to journal motion, thereby allowing smaller eccentricities for a constant load. The overall conclusion of this study is an increase in the effective viscosity due to the micropolarity of the lubricant. This theory may find application in lubrication when additives are used.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129203758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Surface Vorticity Modelling of Separated Flows from Two-Dimensional Bluff Bodies of Arbitrary Shape 任意形状二维钝体分离流的表面涡度模拟
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1981-02-01 DOI: 10.1243/JMES_JOUR_1981_023_003_02
R. Lewis
{"title":"Surface Vorticity Modelling of Separated Flows from Two-Dimensional Bluff Bodies of Arbitrary Shape","authors":"R. Lewis","doi":"10.1243/JMES_JOUR_1981_023_003_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1981_023_003_02","url":null,"abstract":"A method is presented for the computation of separated flows past two-dimensional bodies of arbitrary shape. The surface vorticity technique is used to model the body flow and is combined with vorticity generation, shedding, and convection schemes which simulate the separation regime. The method is applied here especially to bluff body flows and illustrative examples have been limited to symmetrical or half plane flows only. An extension of the technique to free streamline flows is described and illustrated by comparison with the classical solution for free streamline separation from a flat plate.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115121450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 53
A Determination of Cavitation Interfaces in Fluid Film Bearings Using Finite Element Analysis 流体膜轴承气蚀界面的有限元分析
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-12-01 DOI: 10.1243/JMES_JOUR_1980_022_053_02
H. Hayashi, C. Taylor
{"title":"A Determination of Cavitation Interfaces in Fluid Film Bearings Using Finite Element Analysis","authors":"H. Hayashi, C. Taylor","doi":"10.1243/JMES_JOUR_1980_022_053_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_053_02","url":null,"abstract":"The location of both rupture and reformation boundaries in liquid film bearings is important in determining overall performance characteristics. Finite difference approximations have been most widely used in the numerical analysis of hydrodynamic bearings, and the problem of determining cavitation interfaces may be trivial or extremely complex depending upon the physical model adopted. For some situations finite element analysis may offer an advantage and this possibility is investigated here.","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"39 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133027392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Prediction of Turbulent Cavity Flow Driven by Buoyancy and Shear 由浮力和剪切驱动的湍流腔体流动预测
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-12-01 DOI: 10.1243/JMES_JOUR_1980_022_054_02
F. Ideriah
{"title":"Prediction of Turbulent Cavity Flow Driven by Buoyancy and Shear","authors":"F. Ideriah","doi":"10.1243/JMES_JOUR_1980_022_054_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_054_02","url":null,"abstract":"","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126199459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 79
Effect of Swirl on Pressure Recovery in Annular Diffusers 旋流对环形扩压器压力恢复的影响
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-12-01 DOI: 10.1243/JMES_JOUR_1980_022_056_02
D. S. Kumar, K. L. Kumar
{"title":"Effect of Swirl on Pressure Recovery in Annular Diffusers","authors":"D. S. Kumar, K. L. Kumar","doi":"10.1243/JMES_JOUR_1980_022_056_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_056_02","url":null,"abstract":"Annular diffusers are likely to operate with varying amounts of swirl at the inlet. The work described in this paper is concerned mainly with an experimental investigation of subsonic turbulent swirling flows through annular diffusers having diverging hub and casing boundaries. The test facility was designed SO as to peImit different levels of inlet swirl. The static pressure distributions and the axial and tangential velocity profiles were measured with the help of a three-hole cobra probe suitably mounted at different cross sections along the diffuser length. The diffuser performance parameters such as static-pressure recovery, effectiveness, and the total pressure loss coefficient were then computed from the experimental observations. The behaviour of these parameters has been discussed to establish the effect of swirl. The presence of inlet swirl was found to increase the overall static-pressure recovery. A substantial increase in the pressure recovery occurred over the initial stages of diffusion and...","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132530420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Dynamic Total Head Loss Characteristic for an Axial Compressor Rotor 轴流压气机转子动态总水头损失特性
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-12-01 DOI: 10.1243/JMES_JOUR_1980_022_052_02
P. Sharma, J. Railly
{"title":"Dynamic Total Head Loss Characteristic for an Axial Compressor Rotor","authors":"P. Sharma, J. Railly","doi":"10.1243/JMES_JOUR_1980_022_052_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_052_02","url":null,"abstract":"Detailed flow field and pressure measurements during rotating stall operation have been carried out at inlet to and exit from an axial compressor rotor using hot wire anemometers and probes incorporating fast response pressure transducers. An on-line data-acquisition system which employs a phase-lock sampling and averaging technique has been used to obtain ‘phase-lock averaged’ values of flow quantities and pressures. The dynamic total head loss/incidence characteristic for the rotor section at mean diameter has been computed from the above data. The dynamic characteristic exhibits a loop in the stalled region. A simple numerical procedure has been used to obtain the steady-state loss characteristic and the time-lag of this loss. It has been found that the loss time-lag of boundary layer time delay corresponds to a value equal to 1.8 times the time delay due to inertia of fluid in a blade passage. A simple theory for the prediction of this loss time-lag is also presented which shows reasonable agreement w...","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125626604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Thermal Bending of Thick Rectangular Plates of Bimodulus Composite Materials 双模量复合材料厚矩形板的热弯曲
Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23) Pub Date : 1980-12-01 DOI: 10.1243/JMES_JOUR_1980_022_055_02
J. Reddy, C. W. Ber, Y. Hsu, V. S. Reddy
{"title":"Thermal Bending of Thick Rectangular Plates of Bimodulus Composite Materials","authors":"J. Reddy, C. W. Ber, Y. Hsu, V. S. Reddy","doi":"10.1243/JMES_JOUR_1980_022_055_02","DOIUrl":"https://doi.org/10.1243/JMES_JOUR_1980_022_055_02","url":null,"abstract":"Abstract : Closed-form and finite-element solutions are presented for thermal bending and stretching of laminated composite plates. The material of each layer is assumed to be elastically and thermoelastically orthotropic and bimodular, i.e., having different properties depending upon whether the fiber-direction normal strain is tensile or compressive. The formulations are based on the thermoelastic version of the Whitney-Pagano laminated plate theory, which includes thickness shear deformations. Numerical results are obtained for deflections and neutral-surface positions associated with normal strains in both of the in-plane coordinates. The closed-form and finite-element results are found to be in good agreement. (Author)","PeriodicalId":114598,"journal":{"name":"Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115829896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 39
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